CN110334887A - A kind of Calculation Estimation method of cogeneration units economy - Google Patents
A kind of Calculation Estimation method of cogeneration units economy Download PDFInfo
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Abstract
The present invention relates to a kind of Calculation Estimation methods of cogeneration units economy, belong to coal-burning power plant's cogeneration of heat and power technical field.The present invention includes the following steps: step 1: calculating the low level caloric receptivity Q that cogeneration units generate electricity total with boiler when heat supply per hour using thermally equilibrated methodnet, boiler low level caloric receptivity Qnet is converted into mark consumption of coal amountStep 2: the gene-ration revenue P of cogeneration units per hour is calculatedg=W × (1- ηe)×Pe, W is generated output, ηeIt is station service power consumption rate, PeIt is electricity price；Step 3: the heat supply income of cogeneration units per hour is calculatedGsIt is confession heat flow, GrIt is backheat flow, hsIt is for heat content, hrIt is backheat enthalpy, PsIt is caloric value；Step 4: according to the costs and benefits situation of cogeneration units, cogeneration units thermoelectricity standard yield coal consumption hourly is calculated
Description
Technical field
The present invention relates to a kind of Calculation Estimation methods of cogeneration units economy, belong to coal-burning power plant's cogeneration of heat and power skill
Art field.
Background technique
Cogeneration units realize the cascade utilization of energy, reduce the loss of energy conversion process, especially reduce
Steam discharge loss of the steam after steam turbine acting, cogeneration units improve coal-fired power plant unit efficiency of thermal cycle.
In view of this, disclosing a kind of evaluation cogeneration of heat and power machine in the patent document application No. is 201310462987.4
The energy conservation of group economy than analysis method, including the following steps: (1) define the concept of energy saving ratio: energy conservation than for provide same number and
When the thermal energy and electric energy of quality, thermoelectricity point produces the ratio with the non-renewable energy amount consumed in cogeneration of heat and power；(2) energy saving ratio is derived
Calculation formula；(3) the method for calculating energy saving ratio, completes cogeneration units economic analysis.
The index such as net coal consumption rate, heat consumption rate of cogeneration units are evaluated at present by the evaluation index of pure condensate unit economy
Develop, in such a way that benefit returns electricity, does not consider the cold source energy of heat supply portion of energy.This benefit returns the evaluation side of electricity
Formula cannot embody the degree of cogeneration units cascaded utilization of energy, can not reflect that cogeneration units steam turbine efficiency becomes
Change to the influence for thermal energy consumption, is unfavorable for the evaluation of cogeneration units entirety energy consumption level.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, for the existing evaluation of cogeneration units
The Improvement requirement of method and evaluation index, and a kind of Calculation Estimation of cogeneration units economy reasonable in design is provided
Method.
The cascade utilization of cogeneration units energy finally will all be embodied by the effectiveness of operation to generate electricity with heat supply,
Income is the final index of evaluation power generation and distribution of heat optimization.
With the thinking of operation, directly judges that the index of unit generation and district heating economy benefit is exactly income and cost, lead to
The model for crossing " cost benefit " only focuses on energy input and power generation of the fuel in boiler combustion process, heat supply is externally managed
Benefit income, carries out the evaluation method of the cogeneration units economy based on effectiveness of operation, for analyzing cogeneration units
The level of energy utilization.
According to cogeneration units thermodynamic cycle conversion process of energy, the model of " cost benefit " is established；It is built according to model
The evaluation index of vertical cogeneration units；By under the power generation of evaluation index Calculation Estimation cogeneration units difference, supplying thermal condition
Economy.
Technical solution used by the present invention solves the above problems is: the Calculation Estimation of this kind of cogeneration units economy
Method, it is characterized in that: the Calculation Estimation method of the cogeneration units economy, including the following steps:
Step 1: cogeneration units are calculated using thermally equilibrated method and generate electricitys per hour and boiler when heat supply always low
Position caloric receptivity Qnet, boiler low level caloric receptivity Qnet is converted into mark consumption of coal amount
Step 2: the gene-ration revenue P of cogeneration units per hour is calculatedg=W × (1- ηe)×Pe, W is generated output,
ηeIt is station service power consumption rate, PeIt is electricity price；
Step 3: the heat supply income P of cogeneration units per hour is calculatedh=(Gs × hs-Gr × hr) × Ps, GsIt is to supply
Heat flow, GrIt is backheat flow, hsIt is for heat content, hrIt is backheat enthalpy, PsIt is caloric value；
Step 4: according to the costs and benefits situation of cogeneration units, cogeneration units thermoelectricity hourly is calculated
Standard yield coal consumption
Further, " cost benefit " is the thermoelectricity standard yield coal consumption that model calculates, as cogeneration units economy
Property Calculation Estimation index, mark consumption of coal amount BbIt can reflect the step of the transfer efficiency of energy and energy in thermodynamic cycle process
Producing level, PgAnd PhIt can reflect power generation and the level of aspect managed in heat supply.
Compared with prior art, the invention has the following advantages that being passed through the coal consumption of thermoelectricity standard yield as cogeneration units
The Calculation Estimation index of Ji property, both can reflect the cascade utilization journey of the transfer efficiency of energy and energy in thermodynamic cycle process
Degree, and can reflect the level of power generation and heat supply operation aspect.
Specific embodiment
Below by embodiment, the present invention is described in further detail, following embodiment be explanation of the invention and
The invention is not limited to following embodiments.
Embodiment.
If in this specification with reference such as "upper", "lower", "left", "right", " centre " and " one " term, also only just
In being illustrated for narration, rather than to limit the scope of the invention, relativeness is altered or modified, without substantive change
Under more technology contents, when being also considered as the enforceable scope of the present invention.
The Calculation Estimation method of cogeneration units economy in the present embodiment, it is characterised in that: the cogeneration of heat and power
The Calculation Estimation method of unit economy, including the following steps:
Step 1: cogeneration units are calculated using thermally equilibrated method and generate electricitys per hour and boiler when heat supply always low
Position caloric receptivity Qnet, boiler low level caloric receptivity Qnet is converted into mark consumption of coal amount
Step 2: the gene-ration revenue P of cogeneration units per hour is calculatedg=W × (1- ηe)×Pe, W is generated output,
ηeIt is station service power consumption rate, PeIt is electricity price；
Step 3: the heat supply income P of cogeneration units per hour is calculatedh=(Gs × hs-Gr × hr) × Ps, GsIt is to supply
Heat flow, GrIt is backheat flow, hsIt is for heat content, hrIt is backheat enthalpy, PsIt is caloric value；
Step 4: according to the costs and benefits situation of cogeneration units, cogeneration units thermoelectricity hourly is calculated
Standard yield coal consumption
" cost benefit " in the present embodiment is the thermoelectricity standard yield coal consumption that model calculates, as cogeneration units
The Calculation Estimation index of economy marks consumption of coal amount BbIt can reflect the transfer efficiency of energy and energy in thermodynamic cycle process
Cascade utilization degree, PgAnd PhIt can reflect power generation and the level of aspect managed in heat supply.
It is illustrated below with the heating system that three cogeneration units are composed in series, operating condition one is three thermal power plant units
Active is respectively 100MW, 300MW, 300MW, and operating condition two is three thermal power plant units active respectively 125MW, 300MW, 300MW,
The economy of Calculation Estimation cogeneration units.
For the moment, it is 1429.40GJ that heat supply network externally always sells heat per hour to operating condition, calculates, supplies according to 39.33 yuan/GJ of caloric value
The gross earnings of heat are 56218.3 yuan.
For the moment, three thermal power plant unit thermoelectricity income coal consumption 819g/ are first for operating condition.
When operating condition two, the mark coal amount of three thermal power plant units boiler consumption per hour is 48.78t.
When operating condition two, 1 ton of standard coal of burning, three cogeneration units generated energy per hour, which are calculated, is
2583.18kWh, 2934.77kWh, 2964.88kWh are calculated, three thermal power plant units according to 0.349 yuan/kWh of electricity price
The power generation gross earnings of 1 ton of mark coal of burning per hour are 2960.51 yuan.
When operating condition two, it is 1448.42GJ that heat supply network, which externally always sells heat, per hour, calculates, supplies according to 39.33 yuan/GJ of caloric value
The gross earnings of heat are 56966.43 yuan.
When operating condition two, three thermal power plant unit thermoelectricity income coal consumption 814g/ members.
Operating condition two is than operating condition one, under 1 ton of mark coal, per hour three cogeneration units can multiple electricity 172.85kWh, hair
Electric gross earnings can be improved 60.32 yuan.
Operating condition two is than operating condition one, boiler caloric receptivity decline 130kJ when three cogeneration units every per hour first gross earnings.
Operating condition two reduces 5g than operating condition one, the every first earning standard coal consumption of three cogeneration units power generation and heat supplies.
Cogeneration units economic index is as follows:
In addition, it should be noted that, structure, feature and principle described in all inventional ideas according to the present invention done it is equivalent
Variation or simple change, are included in the scope of protection of the invention patent.Those skilled in the art
It can make various modifications or additions to the described embodiments or be substituted in a similar manner, without departing from
Structure of the invention or beyond the scope defined by this claim, is within the scope of protection of the invention.
Claims (2)
1. a kind of Calculation Estimation method of cogeneration units economy, it is characterised in that: the cogeneration units economy
Calculation Estimation method, including the following steps:
Step 1: cogeneration units are calculated and are generated electricity per hour using thermally equilibrated method and are inhaled with the total low level of boiler when heat supply
Heat Qnet, boiler low level caloric receptivity Qnet is converted into mark consumption of coal amount
Step 2: the gene-ration revenue P of cogeneration units per hour is calculatedg=W × (1- ηe)×Pe, W is generated output, ηeIt is factory
Power consumption rate, PeIt is electricity price；
Step 3: the heat supply income P of cogeneration units per hour is calculatedh=(Gs × hs-Gr × hr) × Ps, GsIt is for hot-fluid
Amount, GrIt is backheat flow, hsIt is for heat content, hrIt is backheat enthalpy, PsIt is caloric value；
Step 4: according to the costs and benefits situation of cogeneration units, cogeneration units thermoelectricity standard hourly is calculated
Income coal consumption
2. the Calculation Estimation method of cogeneration units economy according to claim 1, it is characterised in that: " cost-receipts
Benefit " is the thermoelectricity standard yield coal consumption that model calculates, and as the Calculation Estimation index of cogeneration units economy, marks consumption of coal
Measure BbIt can reflect the cascade utilization degree of the transfer efficiency of energy and energy in thermodynamic cycle process, PgAnd PhIt can reflect hair
The level of aspect is managed in electricity and heat supply.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112069442A (en) * | 2020-08-04 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Coal-fired pressure reduction calculation method and system based on heat supply substitution of cogeneration unit |
| CN113052466A (en) * | 2021-03-29 | 2021-06-29 | 润电能源科学技术有限公司 | Coal-fired coupled sludge generator set coal-fired consumption rate calculation method and device |
| CN114997623A (en) * | 2022-05-25 | 2022-09-02 | 华北电力科学研究院有限责任公司 | Method and device for evaluating back pressure function |
-
2019
- 2019-03-11 CN CN201910182115.XA patent/CN110334887A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112069442A (en) * | 2020-08-04 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Coal-fired pressure reduction calculation method and system based on heat supply substitution of cogeneration unit |
| CN112069442B (en) * | 2020-08-04 | 2023-09-12 | 国网山东省电力公司电力科学研究院 | Coal pressure reduction calculation method and system based on heat supply substitution of cogeneration unit |
| CN113052466A (en) * | 2021-03-29 | 2021-06-29 | 润电能源科学技术有限公司 | Coal-fired coupled sludge generator set coal-fired consumption rate calculation method and device |
| CN114997623A (en) * | 2022-05-25 | 2022-09-02 | 华北电力科学研究院有限责任公司 | Method and device for evaluating back pressure function |
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